Union.



PATENTED MAR. 24,4 11908.

H. E. BULLGK.

UNIONt PPLIoA'rIoN FILED SEPT. 2a, 1907.

n MZZOC,

i UNITED STATES OFFICE.

HENRY E. BULLOCK, OF CHICAGO, lILLINOIS, ASSIGNOR TO ILLINOIS MALLEABLE IRON COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

, UNION.

No. esaoso.

Specification of Letters Patent.

Patented. March 24, 1908.

Application filed September 23, 1907. Serial No. 394,198.

To all whom 'it may concern:

Be it known that I, HENRY E. BULLOCK, a

subject of the King of Great Britain, a citizen of the Dominion of Canada, residing at Chicago, in the county of Cook and State of Illino1s, have invented a new and useful Improvement in. Unions, of which the following 1s a speci cation.

Figura/l isa central longitudinal section thro h my improved union g Fig. 2 is a horizonta section of the spud in the line 2 of Fig. 1; and Fig. 3 is a central longitudinal section throu h a modified form of Spud. f

Re erring to the drawings, A is the tailp'iece of my improved union, the same conn rising two )ortions--an outer shell A1 havlng a shoul er a at its upper end and andinserted brass annulus Az screw-threaded into place as illustrated in Fig. 1 and rovided on its upper face with a seat al whic is roughly conical in form but is made with a top surface which in cross-section is slightly rconvex as illustrated.

B is the nut of the union and the said nut is constructed of iron and is of usual form, i. e., internally screw-threaded at its upper end and,v provided at its lower end with an internalyprojecting flange b to engage the shoulder a upon the tail-piece.

30 The spud of the union comprises two portions, a main portion C of iron having at its lower face a seat c of internally conical form,

to coperatie with the 'corresponding seat upon t e tailn iece and having atits upper ,35' end a series o internal threads to coperate 'with ya suitable pipe, and an outer annulus C1 rof brass secured to the ortion C. In the form of device shown in 1V the is castupon the ortion C, being he d in place 40 by an outwai y projecting ange having notches to prevent rotary movement. In th form of deviceshown in Fig. 3, this flange is omitted and the 'annulus C1 'is screwed in place, being held in position by a Vlockingpin c.-

ortion C1 My im roved union is particularly advan- -tageous y reason of the fact thatit produces a brass to iron contact between the nut and spud and a brass to iron contact at the seat, so that corrosion ismnimized in the construction and by reason of these brass to iron contacts .sticking between the arts is made impossible. Theseresults are fought about with the use of the least possible amount of brass consistent with obtaining' satisfactory results.

I realize that considerable variation is possible in the details of the construction herein shown and, described and I do not intend to limit myself thereto except as pointed out in the following claims. By the term brass in this specification and in the following claims, I mean, of course, any metal, brass being the most common example of such metals, which, when brought into contact with iron, willr not form therewith a joint which will stick by reason of corrosion. In practice, brass, bronze or copper Willdoubtess be used for the parts described as of brass.

What I claim as new, and desire to secure `by Letters Patent, is-fl 1. The combination with an iron nut, of an iron spud having an iron seat and provided with a brass annulus threaded to en gage the nut, and a tail-piece having a brass seat to engage the iron seat upon the Spud.

2. The combination with an iron nut, of

an iron tail-piece having an inset brass an-;

nulus provided with a seat, an iron spud hav ing an iron seat to engage said seat upon said inset, and provided with a surrounding brass annulus threaded to engage the nut.

HENRY E. BULLOCK.

In presence of-- Cms. E. GArLonn A. U. THoBmN. 

